# For more information about using CMake with Android Studio, read the
# documentation: https://d.android.com/studio/projects/add-native-code.html

# Sets the minimum version of CMake required to build the native library.

cmake_minimum_required(VERSION 3.4.1) #Cmake的最低版本要求

# Creates and names a library, sets it as either STATIC
# or SHARED, and provides the relative paths to its source code.
# You can define multiple libraries, and CMake builds them for you.
# Gradle automatically packages shared libraries with your APK.

add_library( # Sets the name of the library.
        # 生成动态库的libxxx.so的名字 可以自定义
        mirror-lib

        # Sets the library as a shared library.
        #表明共享动态库 以.so结尾
        SHARED

        # Provides a relative path to your source file(s).
        #我们c、c++文件的路径 也可以添加多个 用空格隔开 想生成多个so文件 就添加多个add_library
        src/main/cpp/mirror-lib.cpp)

# Searches for a specified prebuilt library and stores the path as a
# variable. Because CMake includes system libraries in the search path by
# default, you only need to specify the name of the public NDK library
# you want to add. CMake verifies that the library exists before
# completing its build.

#系统日志库
find_library( # Sets the name of the path variable.
        log-lib

        # Specifies the name of the NDK library that
        # you want CMake to locate.
        log )

#添加libavcodec-57.so
add_library( avcodec-57
        SHARED
        IMPORTED)
set_target_properties( avcodec-57
        PROPERTIES IMPORTED_LOCATION
        ${CMAKE_SOURCE_DIR}/src/main/cpp/ffmpeg/armeabi/libavcodec-57.so)


#添加libavdevice-57.so
add_library( avdevice-57
        SHARED
        IMPORTED)
set_target_properties( avdevice-57
        PROPERTIES IMPORTED_LOCATION
        ${CMAKE_SOURCE_DIR}/src/main/cpp/ffmpeg/armeabi/libavdevice-57.so)

add_library( avfilter-6
        SHARED
        IMPORTED)
set_target_properties( avfilter-6
        PROPERTIES IMPORTED_LOCATION
        ${CMAKE_SOURCE_DIR}/src/main/cpp/ffmpeg/armeabi/libavfilter-6.so)

add_library( avformat-57
        SHARED
        IMPORTED)
set_target_properties( avformat-57
        PROPERTIES IMPORTED_LOCATION
        ${CMAKE_SOURCE_DIR}/src/main/cpp/ffmpeg/armeabi/libavformat-57.so)

add_library( avutil-55
        SHARED
        IMPORTED)
set_target_properties( avutil-55
        PROPERTIES IMPORTED_LOCATION
        ${CMAKE_SOURCE_DIR}/src/main/cpp/ffmpeg/armeabi/libavutil-55.so)

add_library( swresample-2
        SHARED
        IMPORTED)
set_target_properties( swresample-2
        PROPERTIES IMPORTED_LOCATION
        ${CMAKE_SOURCE_DIR}/src/main/cpp/ffmpeg/armeabi/libswresample-2.so)

add_library( swscale-4
        SHARED
        IMPORTED)
set_target_properties( swscale-4
        PROPERTIES IMPORTED_LOCATION
        ${CMAKE_SOURCE_DIR}/src/main/cpp/ffmpeg/armeabi/libswscale-4.so)

add_library( postproc-54 #库的名字
        SHARED #动态库
        IMPORTED) #导入的方式
# 名为postproc-54库的名字 以Cmake文件的路劲为基础查找
set_target_properties( postproc-54
        PROPERTIES IMPORTED_LOCATION
        ${CMAKE_SOURCE_DIR}/src/main/cpp/ffmpeg/armeabi/libpostproc-54.so)

#导入头文件
include_directories(src/main/cpp/ffmpeg/include)

# Specifies libraries CMake should link to your target library. You
# can link multiple libraries, such as libraries you define in this
# build script, prebuilt third-party libraries, or system libraries.

target_link_libraries( # Specifies the target library.
        mirror-lib
        avcodec-57
        avdevice-57
        avfilter-6
        avformat-57
        avutil-55
        swresample-2
        swscale-4
        postproc-54
        # Links the target library to the log library
        # included in the NDK.
        ${log-lib} )